text: import pickle
  
  l = [[], (123,)]
  l.append(l)
  s = pickle.dumps(l)
  print repr(s)
  
  l2 = pickle.loads(s)
  l3 = l2.pop()
  print l2, l3, l2 is l3
  
  print pickle.loads(pickle.dumps("hello world"))
  
  # Sqlalchemy wants this:
  import operator
  print repr(pickle.dumps(len))
  print repr(pickle.dumps(operator.and_))
  
  class C(object):
      pass
  c = C()
  c.a = 1
  print repr(pickle.dumps(c))
  print pickle.loads(pickle.dumps(c)).a
  